I think that the 1199cxi is the one that does not include the transducer. I'm not 100% sure but I would double check before you pull the trigger. The one you probably want is the 1199ci HD SI combo. As far as the unit is concerned, I'm sure you will be more than happy and you will save some money over the equivalent Helix unit. I've got a 999 and love it!
The whole model name is 1199cxi HD SI Combo.
The x means it is an INTERNATIONAL model that has Metric and standard measurements/readouts and language choices.
No difference in functions and operation. Just a higher cost model that meets international standards.
Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, 360, RC-1